3.3.18 Column Plot

Version Info

Minimum Origin Version Required: Origin80 SR0

Plot Float Column with Indexing Color

Example Data

New a worksheet, make sure worksheet page name is "Book1", copy the following example data to worksheet.

Col(A)	Col(B)	Col(C)	      Col(D)
A	30 	196.087 	1
B 	0 	197.747 	1
C 	10 	1.693 	        2
D 	0 	-2.194 	        2
E 	10 	33.214 	        4
F 	10 	-35.101 	4
G 	0 	-16.713 	6
H 	0 	15.993 	        6

Example Code

Run the following function to plot a float column, and set the color of columns depend on column D.

void float_column_plot_ex()
{
	WorksheetPage wksPage("Book1");
	Worksheet wks = wksPage.Layers(0);
	if( wks )
	{
		DataRange dr;
		dr.Add(wks, 0, "X");
		dr.Add(wks, 1, "Y");
		dr.Add(wks, 2, "Y");
		
		GraphPage gp;
		gp.Create("FLOATCOL");
		GraphLayer gl = gp.Layers(0);
		if( gl.AddPlot(dr, IDM_PLOT_COLUMN_FLOAT) >= 0 )
		{
			gl.Rescale();
			
			// Set column D as color index
			const int nIndexingBegin = 100;
			int nFillColor = nIndexingBegin + 2; // column D is the 3rd Y column, Origin C index offset is 0, so add 2 here.
			
			Tree tr;
			tr.Root.Columns.Column1.Pattern.Fill.FillColor.nVal = nFillColor;
			if( 0 == gl.UpdateThemeIDs(tr.Root) )
			{
				bool bRet = gl.ApplyFormat(tr, true, true);
			}
		} 
	}
}